2291436878 has 16 divisors (see below), whose sum is σ = 3458306880. Its totient is φ = 1138687200.

The previous prime is 2291436863. The next prime is 2291436881. The reversal of 2291436878 is 8786341922.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254168 + ... + 263028.

It is an arithmetic number, because the mean of its divisors is an integer number (216144180).

Almost surely, 2^2291436878 is an apocalyptic number.

2291436878 is a deficient number, since it is larger than the sum of its proper divisors (1166870002).

2291436878 is a wasteful number, since it uses less digits than its factorization.

2291436878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9643.

The product of its digits is 1161216, while the sum is 50.

The square root of 2291436878 is about 47868.9552633019. The cubic root of 2291436878 is about 1318.3659144917.

The spelling of 2291436878 in words is "two billion, two hundred ninety-one million, four hundred thirty-six thousand, eight hundred seventy-eight".